M. N. Rao,
« Evaluation of handpump programme in Karnataka ». Institute for Social and Economic Change, Bangalore, India, p. 123 p., 8 p. pl.: fig., tab., 1990.
M. N. Rao,
« Evaluation of handpump programme in Karnataka : executive summary ». Institute for Social and Economic Change, Bangalore, India, p. 11 p.: 1 map, 1990.